Again with the pseudoscience. You guys are killing me. The only sources of power to which humans have access (in the absence of some kind of motor) is muscular contractions and planetary gravity. Why oh why can people not differentiate between mythology, skilful means, and reality?

Hmm... I had no idea that Adolph Hitler could convince an entire country's populace to elect him and support him in getting rid of Jews and trying to conquer the world merely through his muscle contraction and planetary gravity. And all this time I thought it was the power of his oratorial skills and his skill at propaganda... see - you learn something new every day!